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铀同位素衰变成铅,使铀、铅同位素具有内在联系的特点,这是应用铀铅同位素体系演化解决地质问题的根据。本文将通过具体矿床的铀铅同位素体系研究,合理确定成矿时代,并探索矿质来源问题。一、地质概况 752矿床位于某花岗岩体的西南边缘。它以形成年代老和矿化类型特殊而引起人们的重视。此岩体是华南已知最老的产铀岩体,出露于一个穹状复式背斜的核部,为呈北北东向椭圆状的巨型岩基,面积约1000平方公里。围岩主要为元古代复理石建造的浅变质沉积-火山
The decay of uranium isotopes into lead and the inherent relationship between uranium and lead isotopes are the basis for the application of the uranium-lead isotope system to the evolution of geological problems. In this paper, through the study of uranium-lead isotope system of specific ore deposits, the metallogenic epoch is reasonably determined and the source of mineral resources is explored. First, the geological overview 752 deposits on the southwestern margin of a granite body. It is caused by the formation of the old and mineralized type of special attention. This rock mass is the oldest known uranium rock mass in southern China and is exposed at the core of a dome-shaped double anticline. It is a giant rock formation that is north-east to oval-shaped with an area of about 1,000 km 2. Surrounding rock is mainly metamorphic sedimentary metamorphic sediments - volcanoes